Trafalgar can refer to:

• Cape Trafalgar in south west Spain
• The Battle of Trafalgar, fought near the cape
• Trafalgar Square in London, commemorating the above battle
• Trafalgar Day, also commemorating the battle
• Trafalgar class submarines of the Royal Navy, the service's most advanced nuclear attack submarines (in service).
• a 1971 album called Trafalgar by The Bee Gees
• Trafalgar, Victoria, a town in Gippsland, Victoria, Australia
• the Trafalgar Moraine, in Oakville, Ontario, Canada
• Trafalgar, Indiana in the United States of America

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